Lanston monotype perforating machine



Feb. 9, 1926.

w. J. GRIBBIN LANSTON MONOTYPE PERFORATING MACHINE Original Filed March29, 1920 gnucnloz Patented Feb. 9, 1926.

UN TE STATES PATENT OFFICE.

WILLIAM J. ,GRIBBIN, on ,wAsHINs'roN, ms'rnicror COLUMBIA.

LANSTON MonoTYP'n PERFORATING Macn n'n.

App1ic'ationhfi1ed.March 29, 1920, Serial No. 369,574; Renewed June 20,1924.

Toa'll whom it may concern I Be it known that I, WILLIAM J. GRIBBIN, acitizen of the United States of America, and a resident of the city ofIVashington,

5 District of Columbia, have invented certain new and usefulImprovements in Lanston Monotype Perforating Machines, of which thefollowing is a full and clear specification;

This invention has relation to the wellknown Lanston monotypeperforating machine. In this machine, the unit-wheel is rotated inopposite directions by a pair of opposed cylinders adapted to receivecompressed air, one of the pistons of these cylinders being at alltimes, while the machine is in operation, under air pressure. arecertain times when it is desirable or necessary to rotate the unit-wheeldirectly or by 29 intermediate manual mechanism. This operation is quitelaborious for operatives who have but little physical strength, and itis the object of the present invention to provide means whereby thisoperation may be quickly and easily accomplished without the exertion ofany material degree of physical strength, to thereby permit thisoperation to be performed by operatives who would find it fatiguing anddiffcult to operate the unitwheel against the air-pressure in thecylinders.

In the drawing- Fig. 1 is a partial plan and partial sectional view of aportion of a Lanston perforating machine showing my invention appliedthereto;

Figs. 2, 3 and l are detail views hereinafter described.

In the drawing, a designates the usual unit-wheel which is rotated firstin one direction and then in the other by means of a pinion 6 attachedto a shaft and a rack 0 which is reciprocated alternately in oppositedirections by means of restore-cylinder (Z at one side and thedriving-cylinder e at the other side, the shaft of said unit-wheel beingalso provided with a pinion f which drives the usual rack g carrying thescale-pointer it, these parts operating in the usual wellknown manner.The inlet-end of the cylinders d and c are connected by a pair ofconduits i with a valve-chamber j formed in the piston-block of themachine, said conduits being partially shown in dotted lines. Thevalve-chest j is constantly supplied with air under pressure through aconduit 7:; in the There usual manner. The usual reciprocating valve Zis employed for alternately venting the conduits 2', this valve being,as usual, under the control of the keyboard devices, not shown.- Byreciprocating the velvet, it

will be understood that the cylinders'd and V e are alternatelyconnected with the airsupply, to thus drive-their respective pistons inopposite directions. I11 certain operations of the machine, while airpressure is in cylinder 6, the unit-wheel must be r0- tated manuallyagainst the air pressure in said cylinder 6. This operation is afatiguing one for physically weak operatives. To free this cylinder 6from air pressure and thus permit the unit-wheel to be operated by handwithout fatigue, I provide a valve device in the supply-conduit is, justwhere it enters the valve-chamber j. I This valve device is in the formof a rotary plug m provided with a transverse passage a; which isadapted by rotation of the plug to be brought into alinement with theconduit is, to thus permit air to enter the valve-chamber j during theregular operation of the machine. When it is desired to vent thedriving-cylinder 6, this plug 0% is given a quarter turn to thus closethe port a and bring into communication with the valve-chamber 7' a port0 formed longitudinally of the exterior of the plug m. This port 0extends to the outer end of the plug and vents to the atmosphere,thereby relieving the driving-cylinder e of pressure, thus permittingthe unit-wheel and its connected mechanism to be operated withoutfatigueQ When the proper adjustment of the unit-wheel mechanism is made,the usual pawl that holds this unit-wheel against rotation is allowed tore-engage and thus lock the unit-wheel, and then the valve m is rotatedback to normal position to thereby readmit air to the driving-cylinder.

Any suitable means may be provided for rotating the plug-valve m. I showan arm 79 affixed to the shaft of the plug and pivotally connected to apush-and-pull-rod q by means of a lug r, the rod Q being supported inany suitable manner in a. position convenient for operation.

In the perforating machines now in use, there is located at the side ofthe pistonblock opposite the air-chamber 7' and its valve a similarchamber and valve connected in a similar manner with an air-supplysource and by ports with the paper-feed mechanism. It has been found attlmes in the operation of the machine that it is necessary to stop thefeed of the paper; by inserting a valve similar to valve m in a likeposition in reference to the paper-feed'valve I am able to cut off thesupply of air to the paper-feed mechanism and vent the chamber and itsconnections to the atmosphere, thereby stopping the feed oftlle paper.

The nature and scope of the invention having been thus indicated and itspreferred embodiment having been specifically 7 described, What isclaimed asnew is:

1. In a perforating machine of the Lanston pneumatic type, embodying anair-supply-conduit, a reversing valve and cylinders for driving theunit-rack, a valve inserted in the air-supply-conduit between the sourceof pressure and the reversing-valve, said valve being adapted to closesaid supply passage signature.

and to simultaneously vent the valve-chain her and the unit-rack drivingcylinders, for the purpose setforth.

2. In a perforating machineof the Lan-- ston pneumatic type, thecombination with a. piston-b1ock having an air chamber connected tothesource of supply of air and air ports connected to a'n'operatingmechanism of themac hine and a valve in said air-chamber for alternatelyclosing and opening said air-ports from the air supply ,source, -.of aseparate manually operated valve positioned between said air-supplysource and said airchamber for cutting off thesupply of air from thesource and venting said chamber to the atmosphere. f

7 Incl-testimony whereof I hereunto 'alh my WILLIAM J. GRI'BB'IN. Y

